Fan



Dec. 13, 1921.

1,652,285 F. J. MOMURDIE v FAN .Filed Jan. '7. 1926 INVENTOR ATTORN"5 Patented Dee '13, 1927. i

UNITED STATES PATENT OFFICE.

' FRANCIS J. MCMURDIE, OF KALAMA ZOQ MICHIGAN.

Application filed January This invention relates to improvements 1n fans of the peripheral blade type.

The objects of the'in'ventlon are to simplit'y the construction and secure aperiectly balanced and evenly braced fan. The invention relates particularly to improvements in details of the bracing.

Objects relating to details and economies of construction and operation of my lnvention will definitely appear from the detailed description to follow.

The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is illustrated 1n the accompanying drawing, forming a part of this application, in which:

Fig. 1 is a perspective view of one of my improved fan units.

Fig. 2 is an enlarged detail transverse sectional view through the blades showing the manner of connecting one of the outer brace ears, the samebeing'taken on line 2-2 of Figs/1 and 3. 7 v V Fig. 3 is a detail sectional View at right angles to one of the angle bar spokes, taken on line 83 of Fig. 1, showing the details of the connection of one of the double braces, the tanv blades intermediate the connector thereof being omitted. V

The parts of the drawing .will be referred to by their numbers which identify like parts in all the views. g j Referring to the drawing, 1 is the hub.

2 are the spokes of the wheel, made of angle bars, one leg or which is in the transverse plane of the wheel. 3,3 are the vopposed plates or rings for carrying the peripheral blades 4 which are disposed longitudinally of the fan and with the usual curve, being secured in place by rivets 41.

Braces 5, 5 aresecured at their inner ends by cross bolts 51 through the transverse legof the angle bar spoke 2. The outer ends are secured to brackets 6' which are secured by the same rivets 41 which secure the ends of the fan blades in place. The attaching end of the ear is within the face of the fan and adjustably secured to the brace rod 5 by the locking nuts 52, 53 which are adjustable as indicated in Fig. 3. The outer end of the spoke 2 is secured midway to one of the fan blades 21. 3 ,7 v

It is possible by this arrangement to evenly tension the spokescentrally of the 7, 1926. Serial No. 79,801.

fan,'and because the brace is connected cena trally or the spoke at a considerable distance a from the hub, no undue tension-is caused upon the connection, and a very efiectively balanced and evenly supported fan is the result. i

When I say the spokes are of angle bar I mean of right angle, T, or any other suitable cross section, the T being preferred for larger sizes. In small fans particular adjustment by the adjusting nuts is not required, and the braces may be positively joined by rivets or any other means and the adjustment secured by manipulation of the metal itself whenjoining the parts together;

Having thus described my invention, what I claim as new and desire. to secure by Letters Patent, is: V

1. Ina peripheral-blade-fan, the combi nation of a centrally disposed hub with radially disposed spokes of angle bar, one

leg of which is disposed in a central plane transverse to the axis of the fan, peripheral blades and opposed rings for retaining the same, attaching ears riveted to said rings in connection with the'ends of certain of the all said blades, and diagonally disposed brace rods secured to the said transversely disposedlegof the spoke and adjustable by V suitablenutsto the saidears', as specified.

diagonal opposed braces connecting the mid- 100 A as specified; V 7

4. In a peripheral-blade fan, the combination of a double ring embracing and hold dle part of each spoke to the opposed rings,

ing the'blades thereof, a hub with radial spokes, and diagonalopposed braces connecting the middle part of each spoke to the opposed rings, as specified.

In witness whereof I have hereunto set my hand. I

FRANCIS 1 J. MGMURDIE.

lUS. 

